Motor Stall

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This fault occurs when the motor's rotor has stopped rotating despite receiving power, typically due to excessive load, mechanical binding, or an issue within the motor itself. A stalled motor can draw dangerously high currents, leading to winding overheating and potential motor or drive damage if not addressed quickly.

• Excessive mechanical load applied to the motor shaft, exceeding its rated torque capacity (e.g., conveyor jammed, pump seizing).
• Mechanical binding or seizing of driven equipment components (e.g., bearings, gears, coupling) causing rotor immobility.
• Incorrect drive parameters for motor control, such as inadequate torque boost (P2-01) or too aggressive acceleration ramps (P2-02, P2-03).
• Severe reduction in motor supply voltage or current from the AC drive, leading to insufficient torque generation.
• Internal mechanical fault within the motor itself, such as seized bearings or rotor-stator rub.

Haga clic en los pasos para seguir su progreso.

1. 1

   1. Disconnect the motor from its mechanical load and attempt to rotate the motor shaft by hand to check for free movement.

2. 2

   2. With the motor mechanically disconnected, attempt to start the motor at low speed (e.g., 5Hz) from the drive to verify motor rotation.

3. 3

   3. Measure the output current (e.g., P1-05) and output voltage (e.g., P1-06) from the drive during the stall event to identify electrical issues.

4. 4

   4. Review motor control parameters such as P2-01 (Motor Torque Boost) and P2-02 (Acceleration Time) to ensure they are correctly set for the application.

5. 5

   5. Physically inspect the driven equipment for any jams, seized bearings, or foreign objects causing mechanical resistance.